U.S. dropped two million tons of bombs on Laos

"These activities were given the green light by the CIA (in fact, the opium was transported on Air America flights, an airline covertly operated by the CIA). The worst destruction, however, came from the sky: from 1964 to 1973, the United States flew 580,000 bombing missions over Laos." "Since 9/11, the United States has used cluster bombs in Afghanistan, Iraq, and Yemen. The US has also exported cluster bombs to numerous countries, including Israel (which used them in its assault on Lebanon in 2006) and Saudi Arabia (which used them to attack Yemen in 2015)." (thanks Amir)